186581-53-3
重氮甲烷
+
15795-62-7
2,2-dimethyl-5-[(4-nitrophenyl)methylidene]-1,3-dioxane-4,6-dione
→
~67%
6258-48-6
6,6-dimethyl-2-(4-nitrophenyl)-5,7-dioxaspiro[2.5]octane-4,8-dione